Coasts

At the frozen poles or the sultry tropics, the coasts of the Americas host some of the greatest spectacles on earth. At the Falkland Islands in the southern end of the Americas, watch male gentoo penguins perform mating jigs to attract females. Farther north, plunge into the Sea of Cortez off the coast of Mexico, where hordes of voracious giant Humboldt squid cannibalize their kin.